Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d8edd3d0bce913…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 02:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5e8d21cf75a3554a9c85e8b54183843d SHA-1: 42274b935547163bcc6014161445391204874e25 SHA-256: 77d8edd3d0bce91374cd68eb60462677c2d48846a5dfa9b47e61f9e200f90c22
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'Bariatric food guidelines' to entice users to click the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting its use in a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=bariatric+food+guidelines In PDF document text
    • http://rexiv.socratessolano.com/uploads/1/3/1/4/131453494/3585935.pdfIn PDF document text
    • http://files.shibuecaribbean.com/uploads/1/3/0/8/130814666/fazulowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9725/1235/files/kuwivuderixurofugilexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/turafisatizebisus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/jugoritidixuzirifami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8242/4215/files/acronis_true_image_hd_2015_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/pamukipiwejusoraros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/45784208056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/botw_speedrun_record.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3765/1107/files/convert_into_dwg_in_autocad_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/10120979674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/central_limit_theorem_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/aortic_arch_surgery_principles_strategies_and_outcomes.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E15 5240 bytes
SHA-256: 7a193820db0975ca3b91b9e0a52e9deff556f81ccc90faa1c01bbd206008a18e
font_01_sfnt_off00007feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEB 10304 bytes
SHA-256: 784edbfd0c53360672637ee230e5b105d9d7fe6415d04f86c364341c33a244de

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